Want to make all bad guys explode when boss bad guy gets hit.

I need help with creating the logic so that when the "big boss" gets blown up, all the other aliens die as well. Also I want it to take 3 hits to blow up the boss. The game is based on the space invaders demo available on Stencyl.

Thanks!

When actor of type "Big Boss" is killed
For each actor of type "Other Aliens"
Kill actor of type (Other Aliens)